Dungeon Siege is an old game and cannot handle modern graphics card correctly. Sometimes it works and sometimes not.
The game was designed to run with hardware of that time and believe me or not: They have hard coded settings for each graphics card!
This leads to problems with unknown new hardware. Dungeon Siege uses a fall-back configuration for those unknown devices and this results in glitches, black screen, etc.

This guide shows you how to add information about your graphics card to game. So you have a smooth running, good looking game (for a product from 2001).

The first thing you need is a code editor. If you don’t like another program on your pc you can use “notepad.exe” but I don’t recommend this.
What I do recommend is notepad++[notepad-plus-plus.org]!

Now follow the next steps to fix your game:

1. Open the device manager ( HOWTO[www.computerhope.com]) access the properties from your display adapter (expand it first)
   
   
2. Go to the tab Details and select from the drop-down Hardware Ids”
   
   
3. Copy the first entry (use right-click) and insert it in a new text file (notepad++)
   e.g.: PCI\VEN_8086&DEV_1616&SUBSYS_183D1043&REV_09
   
   
4. Modify the entry: 1. Remove everything except VEN_XXXXX and DEV_XXXXXX
   
   
5. Replace VEN_ and DEV_ with 0x
   e.g.:
   VEN_8086 --> 0x8086
   DEV_1616 --> 0x1616
   
   
6. The first will be HWID1; the second will be HWID2. This is your HardwareID!
   
   
7. Go to the location where you have installed Dungeon Siege 1 and open system_detail.gas
   with the code editor.
   
   
8. Use the search function (CTRL+F) to lookup the vendor of your graphics card!
   Keywords: NVIDIA, ATI, Intel
   This is an old game, so owner of cards from AMD have to use the keyword ATI.
   AMD bought ATI much later. ;)
   
   
9. Now we change the general settings for the vendor:
   Note: Instead of $VENDORNAME you should see the actual name of the vendor. Don't change it to $VENDORNAME! I replaced it in this guide to keep this general!
   
   
   [vendor*] { vendor = "$VENDORNAME"; b no_color_control = false; b simple_render = false; b no_complex_shadows = false; b no_flip = true; b below_min_spec = false; b only_16_bit = false; b full_tex_restore = false; b trilinear_filt = true; b shadow_render_target = true; b buffers_frames = true; b scene_fade = true; b tex_state_reset = false; b manual_mouse_copy = false; b modulate_only = false;
   
   
10. Above the first [device*] entry, insert the following:
    
    [device*] { name = "{DEVICENAME}"; x vendorid = {HWID1}; x deviceid = {HWID2}; x driver_product = 0; x driver_version = 0; }
    Replace {DEVICENAME}, {HWID1}, {HWID2}!
    {DEVICENAME} can be anything, but I recommend you to insert the devicename ;)
    Example[s10.postimg.org]
    
    
11. Save and exit
    
    
12. Run DSVideoConfig.exe as administrator
    
    
13. You should see your Graphics Card under “Video Driver” and “Hardware detected”
    
    
14. Change the Settings as you prefer (don’t select "primary display adapter" from the drop-down! Instead select one with the name of your grapics card in it)
    
    
15. Press OK, disable the steam overlay, run the game ;)

If you still have problem do the following:

• Please install DirectX End-User Runtimes (June 2010) DOWNLOAD[www.microsoft.com]
  
  
• Use the non-TnL Driver (DSVideoConfig.exe)
  
  
• Check DungeonSiege.ini (c:\Users\...\Documents\Dungeon Siege LOA\ OR c:\Users\...\Documents\Dungeon Siege\): Does the “driver_description“ match with your graphics card?

CUSTOM RESOLUTIONS:
You can change width and height in “DungeonSiege.ini” (c:\Users\...\Documents\Dungeon Siege LOA\) to achieve higher resolutions in the game.